I have this ATtiny1616 breakout board and I'm attempting to upload an Arduino sketch to it following this documentation, but I'm getting the error "A programmer is required to upload" upon uploading a simple blink sketch. I have the following parameters set in the IDE:

Board: ATtiny

Chip: Attiny1616

Programmer: Serial UPDI: Slow 57600 baud

I am using this USB-Serial adapter and it is connected to the ATtiny like so:

USB Vcc -> Vin

USB GND -> GND

USB RX -> 1k OHM

USB TX -> 1k OHM

1k OHM -> UPDI

And I have an LED connected to pin 5 of the ATtiny:

PIN 5 -> LED -> 220 OHM -> GND

Any help would be greatly appreciated. Thank you.

Edit: Here is the circuit: